Improvement in wood-planing machines



F. DOUGLAS. WOOD PLANING MACHINE.

Patented Apr. 21, 1868.

V removed.

L m Patent 1n. 77,013, dated April 21, 1868 IMPROVEMENT IN WQOD-PLANING mortars.

fitttrlptule nitmh it in that intent Went amt mating at the ma.

To ALL .wHoMrr MAY concerns:

I Be it known that I, Fnssx DOUG-LAB, of Norwich, in the county of N ew London, and State of Connecticut, have invented a new and improved Wood-Planin g Machine; and I do hereby declare that the following isa full, clear, and exact description of the. construction 'and,operntion of the same, reference being had to the annexed drawings, making apart of thisspecification, in whioh- Figure-lie a vertical section through the line are, i fig. 2.

. Figure 2 is a side elevation.,.showing the gear and the ends of the feed-rolls.

Figure 3 represents -an end view of one of the journal-boxes of the gear-wheels, the outer 'cap being The object of this invention is to provide means for rendering the feed-rolls more perfectly self-adjustable to planks, boards, &c., of difi'erent thicknesses. In accomplishing this object,the upper rolls'are'supported in anovel manner, and-'a-ncw kind of adjustable gear is employed to operate them. A new arrangement is also .used for-applying adjusting-weights to the upper rolls.

In the drawings, 'Avrepresents the frame of the machine, and B B'- are the lower feed-rolls, fixed=in position, and rotating upon journals 6 b, by power applied in any suitable manner. 0 G" are the upper feed-rolls, supported upon journals 0 c by a yoke, D,' pivoted at its centre upon a vertically-sliding standard, E, insuch a manner that eitherof the upper feed-rolls can be raised while the other is depressed, the standard or fulcrum E remaining immovable, or, one-of the upper feed-rolls being held immovable as a fulcrum. The other, together with the. sliding standard, can be raised or depressed to a considerable extent. Theobject of this arrangement is that if, in planing, a thin board, F, is run through the machine, and a thick one, G, immediately follows, it will not be necessary to stop the machine and readjust the feed-rolls to let the' latter go through,but while the feed-r0110 is resting on the thin board, the. thic lr one will pass under roll 0, and the roll will rise to accommo-- date it, the slide E rising to allow the roll C to ride over the thick board,- or, if athiok board precedes, the rolls will adjust themselves to the thin one that follows, in an equally perfect manner. I

In order to set the upper rolls at the proper distance from the lower ones, I supporttthe sliding fulcrum or standardE upon a vertical screw-shaft, H, which screws into the standard; and. canvbe rotated by the proper gear, applied to the bevelled gear-wheel h, at its lower extremity. The screw-shaft itself slides up and down through the wheel h, the latter being fixed in position, but is prevented from rotating independentlyof .the bovehwheel by a spline or feather, i. J is a fixed collar on the shaftI, and K 'is a ring or loose collar surround ing the shaft, and resting on the collar 3'. L is a lever, pivoted at l, theshort arm of which is attached to the loose ring K, its long armbeing connected with another lever, L, as shown in the drawings, the latter bearing an adjustable weight. v

I do not intend to confine myself to anylparticularform and construction .of these leversai One alone may b'e used, or, instead of a lever, any other device or mechanical expedient may be employed, by-which the ring K can be connected with an adjustable weight, so that the upper rolls can be made to bear down on the-boards that are planing with any degree of force that the attendantmay deem advisable to employ. As the boards pass between the rolls, they will'lift the upper rolls, raise the slide and screw-shaftH, and throw the weight of the lever upon the ring K. The ring'will thus -be able to adjust its position to the"thiokness of the board that is planing, without at any time ceasing to bear down with the same force upon the upper rolls.

a As the upper rolls are frequently, changing their position, moving up'and down, and assuming different inclinations towards each other, it is necessaryto run them by adjustable gearing that will'change position also,-

and accommodate itself to their movements. Such a gearing I have constructed for the special purpose of its iipplica'tion in this conuection,'-although Idesire to protect myself in its use as applied to anykind of machinery where adjustablegearing is necessary. It consists of four opur wheels, one of them, m, boing fixed to the end of one'of the lower feed-rollers; another, at, b'eingfixed to the same end of the movable feod-r oll'erabove;

another, at, gearing into the wheel m, and held in connection with it bya movable arm, a, pivoted on the'shaft or journal b; and another, at, gearing into the wheels m and mend held in connection with the wheel m by emovnble arm, o, pivoted to the shaft or journal c. The movnblefends of the two arms 0 and o are connected bytlie arm 0, By this means, the wheels n n. can be swung up zinddown on the zirms which hold them, with out throwing either of them out of gear with the wheel on thefeerl-roller'with which it is connected. In order to render them more completely self-adjustable to the changingtposition of the upper feed-rollers, I extemlthe upper arm, 0, beyond the bearing oi the wheel n, as seen ate, and, I there connect it with still another arm, a, the lower end of which works one fixed pivot, 12. This apparatus holds the gear-wheels in position, .while allowing them to move sulficlently to adjust themselves, at all times, to the position of the feed-rollers.

I am nwarcthct adjustable gearing has been made before, in which wheels similar to thos'e shown nt n m are employed, in connection with pivoted arms somewhat similrir to thoseshown at o '0' 6 I do not claim to be the inventor of such deyiee, when unconnected with the regulating-arm 0, (working in the manner described. In. all the genrings of this kind hitherto in use, the journals, n',' ofthe wheels n have been supported in simple holes .in the urms. I provide forthem, however, 'a benring,.r, ntte'chedfto the arm by screws, 't t, and which can be odjustedtor removed." dVhen tho journals'are in their-bearings,end the arms are in position, all the bearings of said 'geuring can be oiled' while in motion. I cover the ends of the boxes and journals with a co p,-'u, fixed to the boxes by screws, In .the drawings, I hnve'shown the supportsfor only one end of the feed -rolls. I support their other end preferably in a hinged or sliding frame, which can be moved away or turned back ouits hinges, sons to remove the boxes from the journals 0' 0', and leave the 'rolls;

in the position shown in fig. 1; The rolls min then bereudily-removed.

Having thus described my invention what I claim as new, ,and desire to secure by Letters Intcnt,,is-

1. Supporting the feed-rollers C 1' upon o. libroting beam, D, which itself is supported by a sliding stand and, that permits it to be edjusted higher or lower, when constructed to operate subste'ntinl ly as end; for the purpose described. l o a I i 2. The combination, with the sliding stnndurd'E, of the sorew-sheft H, having theoollnr,chitseqhivnlerit',

J, and operating in connection with the ring K, lever L, or itsequivnlent, nnd bevel-gurh, all constructed to operate substantially as and for the purpose specified. v I o 8.- The pivoted arm a, when applied to the spur-gearing it MP, to m, and operating in connection with rsnid gaming, and with the armso o 0 o, 'constructed'to eperntesubstantially as and for the purpose-described.

' 4. The removable bearing 1', when used in connection with the gums 0 a in an adjustable gear, substantially its end for the purpose specified. 1 FRANK. DOUGLAS.

Witnesses: ALBnn'r'H Bones,

Anmm 8. Term. 

